Nearly flawless. There's three tiny marks in the 4th pic, otherwise it looks brand new. They're just noticable with a nice camera zoomer way in, so in typical every day light you wouldn't even see if unless you were looking for it. This unit looks incredible for its age. This will be shipped double boxed to preserve the original ppi box.

If you don't know how this works:
Put the PSC-221 in front of the mids/highs amp. You start with the knobs to the far right and move them left until the bass is aligned/centered with the fronts. Now move the knobs away from each other (one click at a time) until each side sounds aligned. One side might need a few more click than the other, but that's the idea. You can really fine tune the **** out of your system. There's bypass switches to let flip back and forth to hear your progress, as well as 180 degree flip switches.... The manual is an easy read and has lots more info.

The goods:
Adjustable left and right channel phase shift control
Phase control ByPass switch
Left and right 180 phase shift switch